I was playing around with it today and I emailed some word doc.s that were done on Microsoft office on my MBP. If you click and hold on the attachment in the email, an option to open the file in Pages will be there. It actually works very smoothly.
I also did the same with a PowerPoint and a excel spreadsheet. They all translated very well to the iPad apps. Obviously some features from Microsoft Office are missing (fonts and small formatting options) but the iPad makes the necessary changes in order to open.
Long story short, the answer is YES! Hope this helps!